Young detective Zhang Gufeng returns to his hometown on secondment to reopen an old case in which his father died in the line of duty ten years ago. He fought side by side with the hot-blooded detective Fu Linyan, the iron-faced prosecutor Sun Yaxuan and other righteous forces. With his excellent criminal investigation skills and unyielding faith, he peeled off the cocoons to restore the truth of the times, and finally brought the hidden murderer to justice, and defended the absolute dignity of the law to the death.
